Elastically Effective Chains in Transient Gels with Multiple Junctions
Elastically Effective Chains in Transient Gels with Multiple Junctions
复制标题
具有多个连接点的瞬态凝胶中的弹性有效链
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
M. Ishida
中科院分区：
文献类型：
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作者：
F. Tanaka;M. Ishida
大多数热可逆凝胶具有多个结合两个以上网络链的连接点。在单个连接处结合在一起的链的数量称为连接点的多重性。基于 Scanlan−Case 准则，对于几种重要的多重分布类型，计算具有多个连接点的热可逆凝胶中弹性有效链和有效连接点的数量，作为聚合物浓度和温度的函数。研究发现，在溶胶/凝胶转变浓度附近，弹性有效链的数量随着浓度偏差的立方而增加，并达到渐近的高浓度区域，在该区域中，弹性有效链的数量与浓度成比例地增加。将结果与观察到的缔合聚合物的弹性模量进行比较。
Most thermoreversible gels have multiple junctions combining more than two network chains. The number of chains bound together in a single junction is called the multiplicity of the junction. On the basis of the Scanlan−Case criterion, the numbers of elastically effective chains and effective junctions in thermoreversible gels with multiple junctions are calculated as functions of the polymer concentration and the temperature for several important types of multiplicity distribution. It is found that the number of elastically effective chains increases as the cube of the concentration deviation near the sol/gel transition concentration and reaches an asymptotic high-concentration region where it increases proportionally to the concentration. The result is compared with the observed elastic moduli of associating polymers.